My dear old friends,’ repeated Dr. Heidegger, ‘may I reckon on your aid in performing an exceedingly curious experiment?’

Which BEST restates the information in the following sentence from paragraph 5?
Responses
A Could you please perform an experiment on me?Could you please perform an experiment on me?
B I have something to show you, but it is exceedingly difficult.I have something to show you, but it is exceedingly difficult.
C Friends, I know you’re all old, but I have an aid for you.Friends, I know you’re all old, but I have an aid for you.
D Friends, could you assist me with an unique and strange experiment?Friends, could you assist me with an unique and strange experiment?

D Friends, could you assist me with an unique and strange experiment?